1623456040 has 16 divisors (see below), whose sum is σ = 3652776180. Its totient is φ = 649382400.

The previous prime is 1623456011. The next prime is 1623456041. The reversal of 1623456040 is 406543261.

It can be written as a sum of positive squares in 2 ways, for example, as 1550626884 + 72829156 = 39378^2 + 8534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1623455993 and 1623456011.

It is not an unprimeable number, because it can be changed into a prime (1623456041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20293161 + ... + 20293240.

Almost surely, 2^1623456040 is an apocalyptic number.

1623456040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1623456040 is an abundant number, since it is smaller than the sum of its proper divisors (2029320140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1623456040 is a wasteful number, since it uses less digits than its factorization.

1623456040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40586412 (or 40586408 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1623456040 is about 40292.1337235942. The cubic root of 1623456040 is about 1175.2948805697.

The spelling of 1623456040 in words is "one billion, six hundred twenty-three million, four hundred fifty-six thousand, forty".